Primetals Technologies Germany Gmbh

Siemens Aktiengesellschaft

Marco Miele

Matthias Kurz

Friedemann Schmid

Alexander Thekale

Johannes Reinschke

Christopher Gusek

Martin Vogt

Jens Frenzel

Karola Gurrath

Prior to the rolling of a flat rolling material () on a rolling line that includes a number of roll stands (), a control system () receives actual variables (I) and target variables (Z) of the material (). The control system () determines desired values (S*) for the roll stands (), based on the actual (I) and target variables (Z) in combination with a model () of the rolling line, such that expected variables (E) of the material () after its rolling are aligned as far as possible with the target variables (Z) and transfers the desired values (S*) to the roll stands () such that the material () is rolled according to the desired values (S*). The target variables (Z) comprise at least one freely selectable, discrete characteristic variable (Kto K, K' to K&#x2032;, K&#x2033; to K&#x2033;) defining the contour (K) of the flat rolling material ().

Targeted adjusting of the contour using corresponding specifications

A model () is based on mathematical-physical equations. The model models the production of a particular output product () from at least one input product () supplied in each case to an installation in the raw materials industry on the basis of operation (B) of the installation. During production of the output products (), the installation is controlled by a control device () in such a manner that particular actual operation (B) of the installation corresponds as far as possible to particular desired operation (B*) of the installation. The desired operation (B*) is determined by the control device () using the model () of the installation. The model () is parameterized according to a number of first model parameters (P) for the purpose of modelling the installation. After a multiplicity of output products () have been produced in each case, actual sizes (A) of the output products () in the particular multiplicity are compared with expected sizes (A') of the output products () in the particular multiplicity. On the basis of the comparison, the first model parameters (P) are newly determined and the model () in the control device () is newly parameterized according to the new values of the first model parameters (P). After this time, the desired operation (B*) is determined by the control device () using the newly parameterized model () of the installation in the raw materials industry. The expected sizes (A&#x2032;) are determined by means of the model (), wherein the determination of the expected sizes (A&#x2032;) is based on the actual operation (B) of the installation.

Optimization of the modeling of process models

Input variables, which describe a metal strip prior to and after the passage of a rolling stand, are fed to a material flow model. The material flow model determines online a rolling force progression in the direction of the width of the strip and fees said progression to a roller deformation model. The latter determines roller deformations from said progression and feeds them to a desired value calculator, which calculates the desired values for the controlling elements of profile and surface evenness using the calculated roller deformations and a contour progression on the runout side.

Computer-aided method for determining desired values for controlling elements of profile and surface evenness

Growing community of inventors

Erlangen, Germany

Marco Miele